CVE-2026-23191: ALSA: aloop: Fix racy access at PCM trigger

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• linux linux kernel2.6.37 and later · before 6.12.70
• linux linux kernel6.13 and later · before 6.18.10
• linux linux kernel6.19

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

• Linux Linux

  • 2.6.37affected
  • b1c73fc8e697eb73e23603e465e9af2711ed4183 and later · before f57467114f40c5aacebbea96fb4ff9e5cd2b7f18affected · git
  • b1c73fc8e697eb73e23603e465e9af2711ed4183 and later · before c99be0d5af02adebe9cb6f9869d20397fa9935a3affected · git
  • b1c73fc8e697eb73e23603e465e9af2711ed4183 and later · before f3ce8be893726899e3053cf8059ecc95d8410359affected · git
  • b1c73fc8e697eb73e23603e465e9af2711ed4183 and later · before 0e6245b2424d126ac90018142d09f0707e12998baffected · git
  • b1c73fc8e697eb73e23603e465e9af2711ed4183 and later · before bad15420050db1803767e58756114800cce91ea4affected · git
  • b1c73fc8e697eb73e23603e465e9af2711ed4183 and later · before 5727ccf9d19ca414cb76d9b647883822e2789c2eaffected · git
  • b1c73fc8e697eb73e23603e465e9af2711ed4183 and later · before 826af7fa62e347464b1b4e0ba2fe19a92438084faffected · git
  • before 2.6.37not affected · semver
  • 5.10.270 and later · up to and including 5.10.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
  90Now
• CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
  89Now
• CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
  85Now

Published before and after this one in the same product

• ← EarlierCVE-2025-71221Feb 14, 2026 · dmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue()
  28Monitor
• ← EarlierCVE-2026-23185Feb 14, 2026 · wifi: iwlwifi: mld: cancel mlo_scan_start_wk
  31Monitor
• Later →CVE-2026-23193Feb 14, 2026 · scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count()
  31Monitor

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1free(dev->buf);2/* ... another thread is still running ... */3process(dev->buf);

1lock(&dev->lock);2free(dev->buf);3dev->buf = NULL;4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.